The RFID Guardian is a mobile battery-powered device that offers personal RFID security and privacy management for people. The RFID Guardian monitors and regulates RFID usage, on the behalf of consumers.
The RFID Guardian is meant for personal use; it manages the RFID tags within physical proximity of a person (as opposed to managing RFID tags owned by the person, that are left at home). The RFID Guardian is portable. It should be PDA-sized, or better yet, could be integrated into a handheld computer or cellphone. The RFID Guardian is also battery powered. The RFID Guardian also performs 2-way RFID communications. It acts like an RFID reader, querying tags and decoding the tag responses, and it can also emulate an RFID tag, allowing it to perform direct in-band communications with other RFID readers.
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http://www.theinquirer.net/default.aspx?article=39170
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